104542221 has 16 divisors (see below), whose sum is σ = 159684224. Its totient is φ = 59595264.

The previous prime is 104542213. The next prime is 104542259. The reversal of 104542221 is 122245401.

It is not a de Polignac number, because 104542221 - 2³ = 104542213 is a prime.

It is a super-2 number, since 2×104542221² = 21858151943225682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104542211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3345 + ... + 14841.

It is an arithmetic number, because the mean of its divisors is an integer number (9980264).

Almost surely, 2^104542221 is an apocalyptic number.

It is an amenable number.

104542221 is a deficient number, since it is larger than the sum of its proper divisors (55142003).

104542221 is a wasteful number, since it uses less digits than its factorization.

104542221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11940.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 104542221 is about 10224.5890381961. The cubic root of 104542221 is about 471.0827925014.

Adding to 104542221 its reverse (122245401), we get a palindrome (226787622).

The spelling of 104542221 in words is "one hundred four million, five hundred forty-two thousand, two hundred twenty-one".